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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
7 9 5
6 7 8 ×
8 × 5 =
40
8 × 90 =
720
8 × 700 =
5600
70 × 5 =
350
70 × 90 =
6300
70 × 700 =
49000
600 × 5 =
3000
600 × 90 =
54000
600 × 700 =
+ 420000
539010